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http://dx.doi.org/10.5515/KJKIEES.2019.30.1.8

Ku-Band 50-W GaN HEMT Internally-Matched Power Amplifier  

Kim, Seil (Department of Radio & Information Communications Engineering, Chungnam National University)
Lee, Min-Pyo (Department of Radio & Information Communications Engineering, Chungnam National University)
Hong, Sung-June (Department of Radio & Information Communications Engineering, Chungnam National University)
Lim, Jun-Su (Department of Radio & Information Communications Engineering, Chungnam National University)
Kim, Dong-Wook (Department of Radio & Information Communications Engineering, Chungnam National University)
Publication Information
Abstract
In this paper, a Ku-band 50-W internally-matched power amplifier is designed and fabricated using a CGHV1J070D GaN HEMT from Wolfspeed. To obtain the same magnitudes and phases for the output signals of the unit transistor cells, which constitute a power transistor, a slit pattern and an asymmetric T-junction are used in the input and output matching circuits. The internally-matched power amplifier is fabricated on two different thin-film substrates with relative dielectric constants of 40 and 9.8, respectively, and is measured under pulsed conditions with a pulse period of $330{\mu}s$ and a duty cycle of 6%. The measured results show a maximum output power of 50~73 W, a drain efficiency of 35.4~46.4%, and a power gain of 4.5~6.5 dB from 16.2 to 16.8 GHz.
Keywords
GaN; HEMT; Power Amplifier; Internally-Matched; Ku-Band;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 이상홍, 김성일, 민병규, 임종원, 권용한, 남은수, "차세대 GaN 고주파 고출력 증폭기 기술 동향," 전자통신동향분석, 29(6), pp. 1-13, 2014년 12월.   DOI
2 D. W. Kim, "An output matching technique for a GaN distributed power amplifier MMIC using tapered drain shunt capacitors," IEEE Microwave and Wireless Components Letters, vol. 25, no. 9, pp. 603-605, Sep. 2015.   DOI
3 강현석, 이익준, 배경태, 김세일, 김동욱, "S-대역300 W급 GaN HEMT 고조파 튜닝 내부 정합 전력증폭기," 한국전자파학회논문집, 29(4), pp. 290-298, 2018년 4월.
4 Wolfspeed. "GaN HEMT CGHV1J070D," 2017. Available: http://www.wolfspeed.com.
5 K. Mori, J. Nishihara, H. Utsumi, A. Inoue, and M. Miyazaki, "X-band 14 W high efficiency internally-matched HFET," in 2008 IEEE MTT-S International Microwave Symposium Digest, Atlanta, GA, Jun. 2008, pp. 315-318.